NEW MALLOPHAGA. O 



Specimens from tlie Red-crested Merganser, Mergan- 

 ser serrator (Kodiak Island, Alaska). Previously taken 

 by me from same host species and from seven other 

 duck species (Kansas and California). 



Docophorus cordiceps Giebel. (Plate I, fig. 2). 



lusecta Epizoa, 1S74, p. 103. 



Docophorus glareoUt Giebel, Zeitschr. f. ges. Natarvriss., 1866, 



vol. xiviii, p. 312. 

 Docophorus nitzsrhin Giebel, Zeitschr. f. ges. Naturwiss., 1866, 



vol. xxviii, p. 31'2. 

 Docophorus mollis, Nitzsch (ed. Giebel), Zeitschr. f. ges. Natnrwiss. 



1861, vol. xviii, p. 312. 

 Docophorus f rater Giebel, Insecta Epizoa, 1874, p. 103. 

 Docophorus cordiceps Giebel, Piaget, Les Pediculines, 1880, p. 80 



and p. 664. pi. vi, tig. 2; Picaglia, Pediculini dell' istituto 



aoat.-zool. d. R. Uuiv. d. Modena, 1885, reprint, p. 11. 



A male, a female and a young specimen which may 

 be referred to this species from Triui^a macularia (Pan- 

 ama), and a male from Tringa sp. (Baja California). 

 It is probable that Denny's D. cejihalus (Monograph. 

 Anoplur. Brit., j). 81, pi. ii, fig. 8; and Grube, Midden- 

 dorff's Reise, 1851, p. 470) is this species. 



The species may be recognized by its general dark 

 coloration, broad head, short clypeus, and prominent 

 and characteristic genitalia. I figure the male; Piaget 

 has figured the female. The measurements of my spec- 

 imens are as follows: male, body, length 1.6 mm., 

 width .72 mm.; head, length .56 mm., width .62 mm.; 

 female, body, length 1.65 mm., width .87 mm.; head, 

 length .62 mm., width .75 mm. 



Docophorus latifrons Nitzsch. (Plate I, figs. 5 and 8). 



Germars Mag. Entomol., 1S18, vol. iii, p. 290. 

 Pediculus cuculi Fabricius, Syst. Ent., 1775, p. 807. 



